CN101188394A - Voltage output device for automatic adjusting electromotor based on dual-channel circuit - Google Patents
Voltage output device for automatic adjusting electromotor based on dual-channel circuit Download PDFInfo
- Publication number
- CN101188394A CN101188394A CNA2007100457430A CN200710045743A CN101188394A CN 101188394 A CN101188394 A CN 101188394A CN A2007100457430 A CNA2007100457430 A CN A2007100457430A CN 200710045743 A CN200710045743 A CN 200710045743A CN 101188394 A CN101188394 A CN 101188394A
- Authority
- CN
- China
- Prior art keywords
- voltage
- generator
- excitation
- voltage regulator
- circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Control Of Eletrric Generators (AREA)
Abstract
The invention provides a double-passage circuit device which can automatically adjust the outputted voltage of a generator. The two circuits of voltage regulators are arranged and are respectively connected with sampling circuits, and each voltage regulator is connected with a measuring unit. An automatic voltage regulator AVR and a field-excitation circuit regulator FCR are arranged. The two circuits of the voltage regulators respectively output control pulse to silicon controlled rectifier bridge control units, control the output of a rectifier circuit, regulate the field-excitation voltage and the field-excitation current of the generator, and stabilize the outputted voltage of the generator. Control logic units are also arranged and are respectively connected with the two circuits of the voltage regulators and the rectifier bridge control units, when the measuring unit detects that one circuit of voltage regulator goes wrong, and then the other circuit of voltage regulator is switched on automatically. The invention adopts double-passage automatic voltage regulators, has high reliability, and provides redundancy for the machine unit further. The passages are kept separate on all links from a regulated power supply to a phaseshift trigger, the device is ensured to be high reliable, and the outputted voltage of the generator is ensured to be stable.
Description
Technical field
The present invention relates to a kind of generator output voltage device, particularly a kind of voltage output device for automatic adjusting electromotor based on dual-channel circuit.
Background technology
Existing generator output voltage device is that single channel two tunnel is regulated.
Summary of the invention
Technical problem of the present invention is that a kind of generator output voltage voltage output device for automatic adjusting electromotor based on dual-channel circuit stably will be provided.
In order to solve above technical problem, the invention provides a kind of voltage output device for automatic adjusting electromotor based on dual-channel circuit, two road voltage regulators are set connect sample circuit respectively, every road voltage regulator is connected with measuring unit respectively, and be provided with automatic voltage regulator AVR and exciting current controller FCR, this two road voltage regulators difference output control pulse is to the silicon controlled rectifier bridge control unit, the output of control rectified current, regulator generator exciting voltage and exciting current make generator output voltage steady; Other is provided with the control logic unit and is connected with the rectifier bridge control unit with two road voltage regulators respectively, and measuring unit records one road voltage regulator fault, then automatically switches to another road voltage regulator.
Described voltage regulator, be that mutual voltage, the current sample of generator output are delivered to measuring unit, through the parameter of digital-to-analogue conversion and setting relatively after, it is preferred to deliver to maximin optimization unit with underexcitation limiter parameters, overexciation limiter parameter and parameters of power system stabilizer, deliver to the PID controller at last, output control pulse.
Described automatic voltage regulator AVR and exciting current controller FCR are the parameters of sending here with measurement behind the manual setup parameter, PID controller output control pulse.
Binary channels No. four adjusters of the present invention taked redundant measure, i.e. two automatic passages of AVR, standby each other, the master control borad of each automatic passage all contains an automatic voltage regulator AVR and exciting current controller FCR, when the master control borad fault, do not have disturbance from master control borad and switch to the reserve exciting current controller, the reserve exciting current controller realizes with software on expansion gate pole control board EGC, during operate as normal, normally switch to the automated manner of alternate channel from the automated manner of operation passage, any one passage can be operated in operational mode or standby mode, in the time can not switching to the alternate channel automated manner, just switches to manual mode, if two passages are cisco unity malfunction all, excitation system will start trip signal, by this operational mode, can greatly improve the generator mean free error time.
Superior effect of the present invention is:
1) adopts the binary channels automatic voltage regulator, have very high reliability; Independently manually alternate channel also can provide trigger impulse and overcurrent protection, for unit further provides redundancy.
2) each passage triggers each link and all keeps separate from the stabilized voltage power supply to the phase shift, has guaranteed that height of devices is reliable.
Description of drawings
Fig. 1 is a schematic block circuit diagram 1 of the present invention;
Fig. 2 is a schematic block circuit diagram 2 of the present invention;
Fig. 3 is the block diagram of band backup manual controller FCR of the present invention;
Fig. 4 is the block diagram of automatic voltage regulator of the present invention;
Fig. 5 is the basic circuit diagram of automatic voltage regulator of the present invention;
Fig. 6 is an operation principle block diagram of the present invention;
The number in the figure explanation:
The 1-generator; The 2-mutual voltage;
3-mutual inductance electric current 4-excitation transformer;
The 5-current transformer; The 6-measuring unit;
The 7-protected location; The 8-monitor unit;
9-automatic voltage regulator AVR and exciting current controller FCR;
10-control logic unit; 11-excitation demagnetization unit;
The 12-field circuit breaker; 13-rectifier bridge control unit;
The 14-rectifying device; The 15-PID controller;
16-backup manual exciting current controller.
Embodiment
See also shown in the accompanying drawing, the invention will be further described.
As depicted in figs. 1 and 2, the invention provides a kind of voltage output device for automatic adjusting electromotor based on dual-channel circuit, two road voltage regulators are set connect sample circuit respectively, every road voltage regulator is connected with measuring unit 6 respectively, and be provided with automatic voltage regulator AVR and exciting current controller FCR9, this two road voltage regulators difference output control pulse is to silicon controlled rectifier bridge control unit 13, the output of control rectified current, regulator generator 1 exciting voltage and exciting current make generator 1 output voltage steady; Other is provided with control logic unit 10 and is connected with rectifier bridge control unit 13 with two road voltage regulators respectively, and measuring unit 6 records one road voltage regulator fault, then automatically switches to another road voltage regulator.
Described voltage regulator, be that measuring unit 6 is delivered in mutual voltage 2,3 samplings of mutual inductance electric current of generator 1 output, through the parameter of digital-to-analogue conversion and setting relatively after, it is preferred to deliver to maximin optimization unit with underexcitation limiter parameters, overexciation limiter parameter and parameters of power system stabilizer, deliver to PID controller 15 at last, output control pulse.
Described automatic voltage regulator AVR and exciting current controller FCR9 are the parameters of sending here with measurement behind the manual setup parameter, PID controller 15 output control pulses.
As Fig. 1, Fig. 2, Fig. 3, Fig. 4 and shown in Figure 5, generator 1 is to be dragged by prime mover, by regulating excitation, produces electric energy; Excitation transformer 4 is coupling supply voltages, it is satisfied encourage requirement by force, the electrical isolation between power supply and rotor winding, the short circuit current level of restriction alternating current-direct current side;
Automatic voltage regulator AVR and exciting current controller FCR9: the master control borad of each automatic passage all contains an automatic voltage regulator AVR and exciting current controller FCR9, automatically following function is used to realize the steady switching between automatic voltage regulative mode (automated manner) and exciting current regulative mode (manual mode), and switching can be automatic switchover or the artificial switching that is caused by the PT open phase fault;
Excitation and demagnetization unit 11 are in the ordinary course of things, can realize the residual voltage excitation, electronic control circuit can only be about 10V～20V by the required rectifier bridge input voltage of operate as normal, if voltage is lower than this value, at first use the residual voltage excitation, the continuous trigger controllable silicon rectifying bridge rises to this scope with the diode rectification bridge mode with voltage; If in a few times in second, can't set up the required 10V of operate as normal～20V voltage with residual voltage because of reasons such as long-term shutdown cause, then enable standby excitation initiating circuit, set up this voltage with its mode of encouraging; When set end voltage reach the generator rated voltage 10% the time, rectifier bridge can have been taken over excitation control, excitation is withdrawed from automatically, soft excitation process begins and generator 1 voltage is raised to predeterminated level.The control of whole excitation process and monitoring are all realized by AVR software; the spontaneous electric motor protecting of demagnetization process origin or inner excitation protection trip signal starts; act on the disconnection field circuit breaker simultaneously, closed venation dashes and triggers jumper, and rotor current is imported de-excitation resistance.Because pulse is by locking, excitation becomes the secondary alternating voltage and is added on the arc voltage of field circuit breaker, can shorten demagnetizing time.
13 pairs of control impuls of rectifier bridge control unit are carried out preliminary treatment, to guarantee the current-sharing between the rectifier bridge in parallel.The symmetrization of brachium pontis electric current can be by adjusting the inductive element of each brachium pontis and each trigger impulse being carried out independent phase in-migration realize.Also be used for all correlation functions of rectifier bridge are monitored and control;
Rectifying device 14 is that controllable silicon rectifying bridge is the full-controlled rectifier bridge, is made up of the controllable silicon of 6 double-sided cooled.Fast acting fuse of series connection on every controllable silicon.Its main purpose is that out of order controllable silicon branch is isolated, and protects other controllable silicon and fast molten avoiding thereof to damage.During fast acting fuse fusing, the annex of fuse is used spring starting sensitive switch and is acted on control and warning.The capacitance-resistance absorption circuit that is connected to the rectifier bridge AC side can absorb commutation peak voltage and the system's overvoltage that appears at the controllable silicon rectifying bridge secondary.Adopt pulse transformer for providing electrical isolation between major loop and the control loop.The centrifugal blower that adopts alternating current motor to drive provides forced air cooling for the controllable silicon radiator.The N-1 redundancy structure is meant that when one of them rectifier bridge was out of service, all the other rectifier bridges still can satisfy the redundancy structure of all operating conditions under the situation of three and above controllable silicon rectifying bridge parallel operation.The rectifier bridge control unit is responsible for monitoring the operation conditions of controllable silicon rectifying bridge, and the fault that is taken place is carried out analyzing and processing.For example, have two thyristors to break down in different controllable silicon rectifying bridges, and these two thyristors are the arms that belong to different, then excitation system still can keep operation.When only on same arm, occurring two and above transistors breakdown simultaneously, just can start tripping operation.This function has improved the availability factor of excitation system greatly.
The input of PID controller 15 is actual value deviations to set-point, the output voltage of PID controller 15 (promptly controlling voltage U C) is the input signal of gate pole control unit, adjuster is selected the feedback parameter of PID controller 15 automatically according to the action situation of limiter, reach the purpose of optimizing the synchronous generator control performance, to promote the dynamic stability of synchronous generator;
Reserve exciting current controller BFCR16 is from the motion tracking master control borad, when the master control borad fault, can guarantee that from motion tracking not having disturbance from master control borad switches to the backup manual passage, reserve exciting current controller BFCR16 realizes with software on expansion gate pole control board EGC.
The main purpose of automatic voltage regulator AVR is the terminal voltage and the reactive power of accurately controlling and regulating synchronous generator, in order to achieve this end, magnetic field voltage must be reacted to the variation of service conditions apace, be to be no more than several milliseconds the response time, need a controller fast for this reason, it should constantly compare set-point and value of feedback, regulates calculating in the short as far as possible time, finally goes to change the trigger angle of silicon controlled rectifier.
Every cover adjuster is equipped with binary channels; the independently treatment system that each passage is made of master control borad and measuring unit plate; has generator terminal voltage adjusting, exciting current adjusting, excitation monitor protection function and control logic software able to programme; possesses automatic and manual controlled function, according to monitor alarm automatic switchover control channel and control mode.
Any one passage can be operated in operational mode or standby mode.During the work of adjuster, two channel monitoring unit and protected location are but worked simultaneously, and monitor alarm occurring is measured value realization by generator voltage relatively and excitation transformer secondary voltage as the detection to the PT fault.If the difference of two voltages surpasses setting value (generator terminal voltage rated value 15%), logic controller will start switching: two shared one group of PT of passage, switch to the manual mode operation from automated manner, control the tracking Control that voltage and the manual difference of controlling between voltage are used as the reserve adjuster automatically.If binary channels is used separately independently PT, and the PT broken string appears in the operation passage, switches to the automated manner of alternate channel from the automated manner of operation passage, and the tracking signal of alternate channel is the difference of operation passage control voltage and alternate channel control voltage.If two groups of PT break down, switch to manually, if two passages cisco unity malfunction all, adjuster will start trip signal
Manually control model is mainly used in debugging (as in putting into operation of establishing or maintenance process), or conduct standby control model of (as the PT fault) when automatic voltage regulator AVR fault.When moving under the manual control model, regulate the field supply of synchronous generator and regulate as feedback quantity.Manually the given function of control model is identical with the given function of automatic voltage regulator AVR control model.Can adjust minimum and maximum set-point.When moving under manual mode, the set-point of field supply can be controlled by increasing, subtract order.
For fear of the overvoltage that load rejection suddenly under manual mode causes, manual mode has the function of the zero load returned automatically.Under the situation of generator circuit breaker tripping operation, a pulse signal sends adjuster to, makes the manual setting value return to predetermined value immediately, and this predetermined value is 90～100% corresponding with synchronous generator open-circuit excitation electric current generally.
Under the situation of the so-called manual restriction of needs, manually the minimum of control and maximum control point can be according to the functions as current meritorious and reactive power level, or the function of generator virtual voltage calculates.For the manual restriction function, need be from the PT and the measured numerical value of CT of generator.
An automatic tracking controller has guaranteed not have disturbance from automatic mode when manual mode switches.When under automatic mode, moving, come from control signal poor of automatic mode and manual mode, be used to from motion tracking.The resultant error signal of output place of synthetic point is applied on the filter circuit with PI characteristic.The output action of PI filter is on signal selector, (the Uc signal of Uc signal or field current controller sends to door control unit to this signal selector, sends which signal and depends on chosen which kind of control model in logic control automatic voltage regulator AVR.
In two automatic channel arrangement, tracking typically refers to two independently tracking between the passage automatically, tracking signal derives from the difference of operation channel control signals and alternate channel control signal, if two passages are all during cisco unity malfunction, excitation system will be sent trip signal.
The input of PID controller 15 is the poor of actual value and set-point, the output voltage of PID controller 15, promptly be the input signal of so-called control voltage U c as the gate pole control unit, the adjusting parameter of PID controller 15 can be selected in two groups of set points automatically, this depends on which limitation function is that effectively this helps the instantaneous stability of synchronous generator.
The purpose of limiter is to safeguard the safe and stable operation of generator, the accidental shutdown that occurs with the action of avoiding owing to protection relay.
All limiters all have an actual value and a preset value, and actual value is represented confined numerical value, and limiter should activate (promptly working) at the preset value place.Each limiter all produces an error signal Δ, derives from the difference between actual value and the preset value.
Served as and encouraged limiter when working, it will be reduced to excitation on the maximum level that allows, and when underexcitation limiter works, it will be increased to excitation on the needed minimum level.In normal course of operation, generator 1 is worked in the allowed band of power diagram.The input of PID controller 15 is the promptly main error signals of set end voltage deviation signal Δ act-ref (Uact-Uref).If because some operation, the error signal Δ lim-of overexciation limiter becomes and is lower than main error signal, it just has precedence over main error signal so.That is to say that under this special situation, PID controller 15 will be received minimum error signal.This principle is applicable to the situation of underexcitation restriction too, but obviously on another direction.The error signal Δ lim+ of the error signal Δ lim-of overexciation limiter, underexcitation limiter and main error signal Δ act-ref all output to gate and, determine the priority of these signals.In order to make the stable operation of generating function when limiter works, the gain of each slicer error signal can be complementary with an optimal value K individually.In addition, set the PID adjusting parameter of automatic voltage regulator by parameter selector.
As shown in Figure 6, the course of work of the present invention is that the order of excitation input is used to drop into generator excitation, and excitation system provides exciting current to generator amature, and generator boosts to rated value rapidly.When sending the order of excitation input, at the magnetic field switching of open position with auto-closing.Excitation input after the magnetic field switching closure, the exciting current circulation.Generally speaking, can realize the residual voltage excitation.Electronic control circuit can only be about 10V～20V by the required rectifier bridge input voltage of operate as normal.If voltage is lower than this value, at first use the residual voltage excitation, the continuous trigger controllable silicon rectifying bridge rises to this scope with the diode rectification bridge mode with voltage.If in a few times in second, can't set up the required 10V of operate as normal～20V voltage with residual voltage because of reasons such as long-term shutdown cause, then enable standby excitation initiating circuit, set up this voltage with its mode of encouraging.When set end voltage reach the generator rated voltage 10% the time, rectifier bridge can have been taken over excitation control, excitation is withdrawed from automatically, soft excitation process begins and generator voltage is raised to predeterminated level.
Excitation exits command and is used for cutting off immediately generator excitation.The excitation system rectifier bridge switches to inverter operation (magnetic field energy feedback), and de-excitation resistance is in parallel with the rotor winding, and generator is by rectifier bridge and the rapid demagnetization of de-excitation resistance.Excitation exits command and acts on the jumping magnetic field switching simultaneously.After 60 seconds, the rectifier bridge trigger impulse is by locking, and whole excitation system is by complete atresia and excision.
Each passage of excitation system all comprises automatically and manual two kinds of regulative modes.Under automated manner, the automatic regulator generator voltage of excitation system, it is constant to keep generator terminal voltage to greatest extent.Under manual mode, excitation system is kept generator constant excitation megnet field supply automatically.When manual mode is moved, must artificially adjust the excitation (set-point of field supply) of generator according to the load variations of generator, constant to keep generator voltage.
Except that two main channels, excitation system also provides two independently emergency backup passages.Similar to the manual mode of main channel, the emergency backup passage also is provided with an exciting current controller.In addition, the emergency backup passage also is provided with overvoltage protection and forms function with the trigger impulse that is independent of the main channel.Built-in overvoltage protection is the redundant measure of the built-in defencive function in main channel.When system breaks down such as generator protection when moving, excitation system will be out of service automatically, and field switch disconnects simultaneously.
Claims (3)
1. voltage output device for automatic adjusting electromotor based on dual-channel circuit is characterized in that:
Two road voltage regulators are set connect sample circuit respectively, every road voltage regulator is connected with measuring unit respectively, and be provided with automatic voltage regulator AVR and exciting current controller FCR, this two road voltage regulators difference output control pulse is to the silicon controlled rectifier bridge control unit, the output of control rectified current, regulator generator exciting voltage and exciting current make generator output voltage steady; Other is provided with the control logic unit and is connected with the rectifier bridge control unit with two road voltage regulators respectively, and measuring unit records one road voltage regulator fault, then automatically switches to another road voltage regulator.
2. by the described a kind of voltage output device for automatic adjusting electromotor based on dual-channel circuit of claim 1, it is characterized in that:
Described voltage regulator, be that mutual voltage, the current sample of generator output are delivered to measuring unit, through the parameter of digital-to-analogue conversion and setting relatively after, it is preferred to deliver to maximin optimization unit with underexcitation limiter parameters, overexciation limiter parameter and parameters of power system stabilizer, deliver to the PID controller at last, output control pulse.
3. by the described a kind of voltage output device for automatic adjusting electromotor based on dual-channel circuit of claim 1, it is characterized in that:
Described automatic voltage regulator AVR and exciting current controller FCR are the parameters of sending here with measurement behind the manual setup parameter, PID controller output control pulse.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100457430A CN101188394A (en) | 2007-09-10 | 2007-09-10 | Voltage output device for automatic adjusting electromotor based on dual-channel circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100457430A CN101188394A (en) | 2007-09-10 | 2007-09-10 | Voltage output device for automatic adjusting electromotor based on dual-channel circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101188394A true CN101188394A (en) | 2008-05-28 |
Family
ID=39480625
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007100457430A Pending CN101188394A (en) | 2007-09-10 | 2007-09-10 | Voltage output device for automatic adjusting electromotor based on dual-channel circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101188394A (en) |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102130552A (en) * | 2010-01-20 | 2011-07-20 | 株式会社电装 | Vehicle generator |
| CN103023408A (en) * | 2012-12-17 | 2013-04-03 | 辽宁省电力有限公司电力科学研究院 | Self-parallel excitation trigger pulse additional control system |
| CN103580569A (en) * | 2013-11-13 | 2014-02-12 | 国家电网公司 | Flexible and extensible excitation control system |
| CN104579065A (en) * | 2015-02-12 | 2015-04-29 | 河北华北柴油机有限责任公司 | Electric generator low-temperature excitation method and electric generator low-temperature excitation device |
| CN106300633A (en) * | 2016-08-11 | 2017-01-04 | 南昌康富科技股份有限公司 | A kind of excitation source input automatic switchover electromotor |
| CN106357133A (en) * | 2016-10-17 | 2017-01-25 | 株洲四方电气有限公司 | Double-channel hot-standby control device used for heavy-duty rectifier |
| CN109120195A (en) * | 2018-08-23 | 2019-01-01 | 国网江苏省电力有限公司盐城供电分公司 | A kind of synchronous generator brushless excitation regulating system |
| CN109150039A (en) * | 2018-10-19 | 2019-01-04 | 嘉陵江亭子口水利水电开发有限公司 | excitation system and control method |
| CN109541469A (en) * | 2019-01-09 | 2019-03-29 | 中国长江电力股份有限公司 | A kind of generator excited system PT broken string method of discrimination |
| CN110995034A (en) * | 2019-12-11 | 2020-04-10 | 西安西电电力系统有限公司 | Current sharing control method and device for parallel current sources |
| CN113131604A (en) * | 2021-04-29 | 2021-07-16 | 电子科技大学 | Automatic control system for current-sharing output of redundant power supply |
| CN113193803A (en) * | 2021-04-01 | 2021-07-30 | 江西泰豪军工集团有限公司 | Double-voltage online backup voltage regulating system and working method thereof |
| CN114629400A (en) * | 2022-03-22 | 2022-06-14 | 三峡智控科技有限公司 | Control method for establishing initial anode voltage in excitation initiating process |
| CN115133823A (en) * | 2022-09-01 | 2022-09-30 | 广州擎天实业有限公司 | Control method and device of excitation system |
-
2007
- 2007-09-10 CN CNA2007100457430A patent/CN101188394A/en active Pending
Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102130552B (en) * | 2010-01-20 | 2013-10-02 | 株式会社电装 | Vehicle generator |
| CN102130552A (en) * | 2010-01-20 | 2011-07-20 | 株式会社电装 | Vehicle generator |
| CN103023408A (en) * | 2012-12-17 | 2013-04-03 | 辽宁省电力有限公司电力科学研究院 | Self-parallel excitation trigger pulse additional control system |
| CN103580569A (en) * | 2013-11-13 | 2014-02-12 | 国家电网公司 | Flexible and extensible excitation control system |
| CN103580569B (en) * | 2013-11-13 | 2016-04-20 | 国家电网公司 | A kind of flexible extendible exciter control system |
| CN104579065A (en) * | 2015-02-12 | 2015-04-29 | 河北华北柴油机有限责任公司 | Electric generator low-temperature excitation method and electric generator low-temperature excitation device |
| CN106300633A (en) * | 2016-08-11 | 2017-01-04 | 南昌康富科技股份有限公司 | A kind of excitation source input automatic switchover electromotor |
| CN106300633B (en) * | 2016-08-11 | 2019-05-28 | 康富科技股份有限公司 | A kind of excitation source input automatic switchover generator |
| CN106357133A (en) * | 2016-10-17 | 2017-01-25 | 株洲四方电气有限公司 | Double-channel hot-standby control device used for heavy-duty rectifier |
| CN109120195A (en) * | 2018-08-23 | 2019-01-01 | 国网江苏省电力有限公司盐城供电分公司 | A kind of synchronous generator brushless excitation regulating system |
| CN109150039B (en) * | 2018-10-19 | 2024-03-08 | 嘉陵江亭子口水利水电开发有限公司 | Excitation system and control method |
| CN109150039A (en) * | 2018-10-19 | 2019-01-04 | 嘉陵江亭子口水利水电开发有限公司 | excitation system and control method |
| CN109541469A (en) * | 2019-01-09 | 2019-03-29 | 中国长江电力股份有限公司 | A kind of generator excited system PT broken string method of discrimination |
| CN109541469B (en) * | 2019-01-09 | 2021-09-17 | 中国长江电力股份有限公司 | PT disconnection judging method for generator excitation system |
| CN110995034B (en) * | 2019-12-11 | 2021-02-12 | 西安西电电力系统有限公司 | Current sharing control method and device for parallel current sources |
| CN110995034A (en) * | 2019-12-11 | 2020-04-10 | 西安西电电力系统有限公司 | Current sharing control method and device for parallel current sources |
| CN113193803A (en) * | 2021-04-01 | 2021-07-30 | 江西泰豪军工集团有限公司 | Double-voltage online backup voltage regulating system and working method thereof |
| CN113131604A (en) * | 2021-04-29 | 2021-07-16 | 电子科技大学 | Automatic control system for current-sharing output of redundant power supply |
| CN114629400A (en) * | 2022-03-22 | 2022-06-14 | 三峡智控科技有限公司 | Control method for establishing initial anode voltage in excitation initiating process |
| CN115133823A (en) * | 2022-09-01 | 2022-09-30 | 广州擎天实业有限公司 | Control method and device of excitation system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101188394A (en) | Voltage output device for automatic adjusting electromotor based on dual-channel circuit | |
| CN108565974B (en) | Self-powered remote failure protection method and system based on protection device | |
| CN103403990A (en) | A current limitation system for limiting the effects of a fault in a DC grid and a method of operating a current limitation system | |
| CN202663087U (en) | Smart protector for motor | |
| WO2021076323A1 (en) | Reliable power module for improved substation device availability | |
| KR101314123B1 (en) | Switchgear for controling peak using distributed generation of grid connected | |
| KR101622187B1 (en) | Fault current limiter | |
| RU2470435C1 (en) | Device for automatic limitation of overhead power transmission line overload | |
| EP3729580B9 (en) | Recurring fault protection for wind power plants | |
| RU2377630C1 (en) | Stabiliser of ac voltage with elements of protection and back-up (versions) | |
| Gajić et al. | Using IEC 61850 analogue goose messages for OLTC control of parallel transformers | |
| Hunswadkar et al. | Considerations and methods for an effective fast bus transfer system | |
| RU2643787C1 (en) | Method of controlling a shunting reactor at disconnection | |
| CN204013306U (en) | A kind of generator excitation adjusting device and generator system | |
| US11456594B2 (en) | DC power distribution system | |
| Apostolov et al. | Advanced load-shedding functions in distribution protection relays | |
| US11038336B1 (en) | Redundant power module and discharge circuit for improved substation device availability | |
| CN219998141U (en) | Power supply circuit for a switching device and switching device | |
| CN203481793U (en) | Direct current balancing device | |
| CN112803432B (en) | One-key sequential control starting and stopping method for magnetic control type parallel reactor | |
| CN215419565U (en) | Power supply protection device | |
| KR102655598B1 (en) | Device providing lagging reactive power and method for controlling temperature correction thereof | |
| CN118472881A (en) | Control method of excitation system based on double-fan wind stopping | |
| Golovacheva | APPLICATION OF FAST AUTOMATIC STANDBY ON | |
| CN103515929A (en) | Direct current balancing device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20080528 |